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IBM DOORS VS UML_

As of 4 November 2026, UML is named by 818 companies and IBM DOORS by 638; IBM DOORS skews to companies under 200 people (39% vs 44%), UML to companies over 1,000 (32% vs 36%).

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

The website-and-DNS footprint is not comparable between a marketing suite and a CRM: IBM DOORS's script and mail records show on hundreds of thousands of small sites, UML rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.

IBM DOORS: 2–200 employees
39%
UML: 2–200 employees
44%
IBM DOORS: 1,000+ employees
36%
UML: 1,000+ employees
32%
Postings per company, 90 days
7.6 · 4.2
Website or DNS footprint
0 · 0
638companies name IBM DOORS
818companies name UML
85name both
4,820 · 3,461postings in 90 days, IBM DOORS · UML
02 — Side by side

Who chooses which

Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.

By company size
SegmentIBM DOORSshareUMLshareLeans
Self-employed152%192%even
2-10 employees498%638%even
11-50 employees7712%13917%UML
51-200 employees12319%15719%even
201-500 employees9214%10513%even
501-1000 employees548%719%even
1001-5000 employees8313%11714%even
5001-10000 employees376%304%IBM DOORS
10,001+ employees10817%11714%IBM DOORS
By industry
SegmentIBM DOORSshareUMLshareLeans
Manufacturing & industry27543%13617%IBM DOORS
Business & finance services12319%17321%even
Technology & software10717%37346%UML
Automotive488%162%IBM DOORS
Property & construction163%132%even
Transport, logistics & rental163%142%even
Public, community & associations142%233%even
Media & content122%162%even
Utilities & infrastructure122%172%even
Commerce & trade61%121%even
Consumer services & leisure51%162%even
Health care30%61%even
By country
SegmentIBM DOORSshareUMLshareLeans
United States37459%31038%IBM DOORS
Germany569%9612%UML
United Kingdom427%456%even
France325%648%UML
Canada193%273%even
Spain142%111%even
Sweden102%––outside top 12
Australia81%––outside top 12
India71%162%even
Netherlands71%213%even
Belgium61%192%even
Italy61%––outside top 12
Poland––283%outside top 12
Czechia––142%outside top 12
Switzerland––121%outside top 12
Postings by team (share of each tool's postings)
SegmentIBM DOORSshareUMLshareLeans
Engineering (non-software)3,91168%3548%IBM DOORS
Software engineering60811%2,88563%UML
IT operations & business systems2094%76517%UML
Quality, safety & environment1463%110%IBM DOORS
Product, program & project management1022%331%even
Data & AI280%1032%even
Administration & office270%––outside top 12
Sales160%100%even
construction and civil80%50%even
Customer service & success80%20%even
arts media and entertainment60%50%even
skilled trades and field service60%––outside top 12
Design & UX40%10%even
General management & consulting30%160%even
Legal, compliance & risk10%––outside top 12
manufacturing and production10%––outside top 12
procurement and purchasing10%––outside top 12
Travel, leisure & events10%––outside top 12
Education & training––50%outside top 12
Unclassified––40%outside top 12
research and science––30%outside top 12
Finance & accounting––20%outside top 12
logistics warehouse and transport––10%outside top 12
Retail & store operations––10%outside top 12
Go deeper

The companies behind each column

Companies using IBM DOORS →
Companies using UML →
requirements mbse ranked →

Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

UML is named by 818 companies in job postings and IBM DOORS by 638; 85 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/ibm-doors-vs-uml)
How we know

Read from the source, not self-reported

Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →

  • Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
  • Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
  • SegmentsCountry, size and industry from the company profile built from its website.
  • Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
FAQ

IBM DOORS vs UML: questions

Which is more used, IBM DOORS or UML?

By companies naming it in their own job postings, UML (818) over IBM DOORS (638). By website-and-DNS footprint, UML (0 vs 0), because its scripts and mail records sit on many small company sites.

Who chooses IBM DOORS?

39% of IBM DOORS companies have 2 to 200 employees, against 44% for UML. 36% of IBM DOORS companies have over 1,000 employees, against 32% for UML.

Do companies run both?

85 companies name both in their postings, usually IBM DOORS in marketing and UML in sales, or during a migration.

Where do these numbers come from?

From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.

Companies and people

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